<?php$resource = gmp_add ( "123456789012345", // resource $a "76543210987655" // resource $b);// shows the result$string = gmp_strval($resource);?>
$resource = 'GMP instance' $string = '200000000000000'
'GMP instance'
'200000000000000'
#1
gmp_add
("123456789012345", "76543210987655")
#2
("3", "2")